QMAIL-LDAP has native quota support that works very well, it could
easily be stripped out and used stand-alone.
Sam writes...
>For some time I've been racking my brains about various ways to implement
>Maildir quotas in situations where you cannot use filesystem-based quotas
>-- such as when you use a virtual domain manager where all Maildirs have
>the same uid/gid.
>
>Before I waste any more time on this, I'm going to wait for a while and
>give people a chance to poke holes in what I've came up with.
>
>Here's what I'm thinking: http://www.concentric.net/~mrsam/maildirpp.html
>
>It's a bit rough, needs to be rewritten in a more formal way, and cleaned
>up a bit.
--
Aaron Nabil